Reality television star Duane Chapman, better known as Dog the Bounty Hunter, said Wednesday he was joining the manhunt for a professional mixed martial artist whose ex-girlfriend has accused him of a brutal attack on her and a friend. Jonathan Koppenhaver, also known by the name "War Machine" for his time in the Ultimate Fighting Championship, is wanted by the Las Vegas Metropolitan Police Department for questioning in connection with the Aug. 8 attack. Police have not released the names of the two victims but Koppenhaver's former girlfriend, porn actress Christy Mack, said on Twitter that she he suffered 18 broken facial bones, a broken nose and rib and had her liver...

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Reality television star Duane Chapman, better known as Dog the Bounty Hunter, said Wednesday he was joining the manhunt for a professional mixed martial artist whose ex-girlfriend has accused him of a brutal attack on her and a friend. Jonathan...